// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#pragma once
#include "runtime/runtime_state.h"
#include "vec/exprs/vexpr.h"
#include "vec/functions/function.h"

namespace doris {
class SlotDescriptor;
namespace vectorized {
class VSlotRef final : public VExpr {
public:
    VSlotRef(const doris::TExprNode& node);
    VSlotRef(const SlotDescriptor* desc);
    virtual doris::Status execute(VExprContext* context, doris::vectorized::Block* block,
                                  int* result_column_id) override;
    virtual doris::Status prepare(doris::RuntimeState* state, const doris::RowDescriptor& desc,
                                  VExprContext* context) override;
    virtual VExpr* clone(doris::ObjectPool* pool) const override {
        return pool->add(new VSlotRef(*this));
    }

    virtual const std::string& expr_name() const override;
    virtual std::string debug_string() const override;
    virtual bool is_constant() const override { return false; }

private:
    FunctionPtr _function;
    int _slot_id;
    int _column_id;
    bool _is_nullable;
    const std::string* _column_name;
};
} // namespace vectorized
} // namespace doris
